Method and apparatus for reducing ripple in class D amplifiers
US7167048B2 · kind B2 · utility
2Cited by
3References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 26, 2005 |
| Grant date | Jan 23, 2007 |
| Priority date | — |
| Expiry date | Aug 13, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/541
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Class D amplifiers are used for their high efficiency, but they have some undesirable characteristics, one of these being the residual switching frequency ripple. Embodiments of the present invention comprise methods and apparatuses for reducing the switching frequency ripple using a technique known herein as ripple steering. A secondary output is added to the amplifier for the purpose of steering the switching ripple away from the main output thus substantially relieving the main output from a major artifact of prior art Class D amplifiers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.